Starting with the most general effective Hamiltonian comprising scalar and vector operators beyond the standard model, we discuss the impact of various operators on the zero of the forward-backward asymmetry in the dileptonic B decay $\overrightarrow{B}{K}^{*}{\mu }^{+}{\mu }^{-}.$ We find that the zero of the asymmetry is highly sensitive to the sign and size of the vector-vector operators and opposite chirality counterparts of the usual operators. The scalar-scalar four-fermion operators, on the other hand, have a mild effect on the zero of the asymmetry. Our results are expected to be checked in near future experiments.

• Received 7 August 2002

DOI:https://doi.org/10.1103/PhysRevD.66.075012